Motivated by the first search for rare charged-current $B$ decay to four leptons, $\ell \bar{\nu}_\ell \ell^{(\prime)} \bar{\ell}^{(\prime)}$, we calculate amplitude with factorization methods. We obtain $B\to \gamma^*$ form factors, which depend on invariant masses of two lepton pairs, at leading power in an expansion $\Lambda_{\rm QCD}/m_b$ next-to-leading order $\alpha_s$, and $\mathcal{O}(\...

We discuss the specificity of interactions electroweak gauge boson excitations in models with warped extra dimensions. In particular, we show that couplings $W^{\prime}$, $Z^{\prime}$, and $\gamma^\prime$ to SM bosons treated as zero modes 5D fields are either exactly equal or very much suppressed. former case, three-particle four-particle interaction Lagrangians their lowest found explicitly. ...

Previous studies have suggested that defective immune responses in early life may be related to the immaturity of neonatal antigen-presenting cells. To test this hypothesis, we assessed the capacity of neonatal dendritic cells (DC) to prime and polarize in vitro human naive antigen-specific T cells. We report that mature cord blood DC efficiently prime an oligoclonal population of antigen-speci...

We present a search for the charged lepton-flavor-violating decays $\Upsilon(1S)\rightarrow\ell\ell^\prime$ and radiative lepton-flavour-violating $\Upsilon(1S)\rightarrow\gamma\ell\ell^\prime$ [$\ell,\ell^\prime = e, \mu, \tau$] using 158 million $\Upsilon(2S)$ sample collected by Belle detector at KEKB collider. This uses $\Upsilon(1S)$ mesons produced in $\pi^+\pi^-\Upsilon(1S)$ transitions....

The investigation of the environmental radioactivity around the radioactive waste disposal site in Gyeongju is being carried out. The radioactivity of I in groundwater and seaweed are to be measured. The analytical method to measure the radioactivity of I in aqueous media was established. This method contains oxidation-reduction reaction, anion-exchange separation and palladium precipitation. T...